It's possible that if you haven't invoked the link to Receptive correctly, you'll end up with two new tabs opening when you click the link. One would be the Receptive dashboard, and the other would be a second instance of your app or product.
If this is happening, you should check that you have a 'return false' after the receptivePublicLib.loginAndRedirect call in the code.
For more information on how to add the Receptive link, see the help doc here.
If this doesn't fix the problem, get in touch and we'll be happy to help.